Restored "virtual" on two functions we just removed it from.  Due to a bogus svn log command, I thought these were added since 3.1.0, but they were shipped in 3.1.0 and were part of the ABI breakage.  So, we keep them!
Restored "virtual" on two functions we just removed it from.  Due to a
bogus svn log command, I thought these were added since 3.1.0, but they
were shipped in 3.1.0 and were part of the ABI breakage.  So, we keep
them!

winsock/mysqlpp,winsock/mysqlpp,winsock/mysqlpp